/**
 * Copyright 2011 Booz Allen Hamilton.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  Booz Allen Hamilton licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.bah.culvert.configuration;

import java.util.Map.Entry;

import org.apache.hadoop.conf.Configuration;

public class CConfiguration {
	
	public static Configuration addCulvertResources(Configuration conf) {
		conf.addResource("culvert-default.xml");
		conf.addResource("culvert-site.xml");
		return conf;
	}

	/**
	 * Creates a Configuration with Culvert resources
	 * 
	 * @return a Configuration with Culvert resources
	 */
	public static Configuration create() {
    Configuration conf = new Configuration(false);
		return addCulvertResources(conf);
	}

	/**
	 * Creates a clone of passed configuration.
	 * 
	 * @param that
	 *            Configuration to clone.
	 * @return a Configuration created with the culvert-*.xml files plus the
	 *         given configuration.
	 */
	public static Configuration create(final Configuration that) {
		Configuration conf = create();
		for (Entry<String, String> e : that) {
			conf.set(e.getKey(), e.getValue());
		}
		return conf;
	}

	public static Configuration getDefault() {
		return create();
	}

}
